Eleventy Syntax Highlighter (Prism) v5.0.2

• Fix diff-{language} highlighting regression #94 #95 by @sharavananpa

Thank you @sharavananpa!

Milestone: https://github.com/11ty/eleventy-plugin-syntaxhighlight/milestone/16?closed=1
Full Changelog: v5.0.1...v5.0.2